Book consulting device

Abstract

The invention discloses a book consulting device, and relates to the technical field of book consulting. The device comprises a display screen and further comprises a base, and an I-shaped wheel is rotationally installed on the base. During consulting, a character block corresponding to a book name or a character block corresponding to a keyword of book content is found by rotating an I-shaped wheel, Chinese characters on the character block are pressed for retrieval, when the character block is pressed, a convex block on the character block extrudes and abuts against a pressed rod, and then an extrusion plate is forced to be pressed to move, so that the character block can be looked up; when a book to be retrieved is retrieved, the I-shaped wheel is rotated and the character block is pressed at the same time, the operation mode combines mechanical searching and pressing confirmation, interactive experience different from a traditional keyboard or touch screen is provided, and the book to be retrieved can be conveniently and quickly retrieved. And retrieval can be completed while the corresponding character block is found, so that the fun of looking up the book is increased, and the practicability of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of book reading technology, and more specifically to a book reading device. Background Technology

[0002] "Review" means to browse relevant parts of books, periodicals, documents, etc. A library catalog is a table designed to help readers find the books they want to read more easily and quickly. It is a reference tool that is essential for librarians in their work of document acquisition, reference consultation, and preservation of collections, in addition to being used by readers. A book lookup device is a tool that can reveal, identify, and retrieve library collections. It reveals the characteristics of documents, provides a basis for identifying documents, guides the search for documents based on their title, author, subject, classification, etc., and indicates the position of documents on the bookshelves.

[0003] Existing book search systems mostly rely on keyboard typing to search for books, which can be quite tedious, especially when searching for books on the Chinese language, which are numerous and varied in categories. This can make the process even more boring and reduce the user's interest in learning.

[0004] Therefore, the present invention proposes a book reading device to improve this problem. Summary of the Invention

[0005] The purpose of this invention is to provide a book reading device in order to solve the problems mentioned above in the background art.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0007] A book reading device includes a display screen and further includes:

[0008] A base has a rotating I-beam wheel mounted on it. A return spring is mounted on the I-beam wheel, and a pressing plate is mounted on the free end of the return spring. An abutment plate is mounted on the pressing plate. The base has a contact point for being abutted by the abutment plate. The contact point is electrically connected to a microcontroller, which is connected to a display screen. A pressure rod is mounted on the pressing plate. A character block with Chinese characters is slidably mounted on the I-beam wheel. An elastic element is installed between the character block and the I-beam wheel. A protrusion is mounted on the character block for abutting the pressure rod.

[0009] Furthermore, a drive motor is installed on the base, the output shaft of the drive motor is connected to the shaft of the I-beam wheel, a push spring is installed on the base, a positioning block is installed on the free end of the push spring, and a positioning hole for accommodating the positioning block is opened at the bottom of the I-beam wheel.

[0010] Furthermore, a bearing plate is slidably mounted on the I-beam wheel, the bearing plate is connected to an elastic element, a receiving sleeve is mounted on the bearing plate, and two insertion blocks are slidably mounted on the receiving sleeve, penetrating the side wall of the receiving sleeve. An anti-spring is installed between the insertion blocks, a receiving groove for accommodating the receiving sleeve is opened on the I-beam wheel, and a slot for accommodating the insertion blocks is opened in the receiving groove. A support rod is mounted on the I-beam wheel, penetrating the bearing plate and inserted into the receiving sleeve, and the support rod forces the two insertion blocks to move away from each other.

[0011] Furthermore, a drive shaft is rotatably mounted on the base, and the drive shaft is coaxially connected to the output shaft of the drive motor. A deep groove for accommodating the drive shaft is provided on the I-beam wheel, and a protrusion is installed in the deep groove. A groove for accommodating the protrusion is provided on the drive shaft.

[0012] Furthermore, a vertical rod is installed on the top of the I-beam wheel, and a vertical hole for accommodating the vertical rod is installed on the bottom of the I-beam wheel. An inner cavity is opened on the vertical rod, and a compression spring is installed in the inner cavity. A C-shaped plate is installed on the free end of the compression spring. A fixing groove for accommodating one end of the C-shaped plate is opened in the vertical hole, and the other end of the C-shaped plate penetrates the side wall of the I-beam wheel and extends to its outside.

[0013] Furthermore, a buckle is installed on the I-beam wheel, and a tensioning band is slidably disposed on the buckle. The tensioning band is used to abut against the outer end of the I-shaped plate. A bolt is rotatably installed on one end of the tensioning band, and the bolt is threadedly connected to the other end of the tensioning band.

[0014] Furthermore, a guide groove is provided on the base, and the positioning block is slidably inserted into the guide groove, with the side wall of the positioning block fitting against the inner wall of the guide groove.

[0015] Furthermore, an annular plate is installed on the base, the inner diameter of which is the same as the outer diameter of the I-beam wheel, and the annular plate and the base form a recess for accommodating the I-beam wheel.

[0016] Furthermore, a dust cover is installed on the base, the inner diameter of the dust cover is larger than the outer diameter of the I-beam wheel, and the dust cover has a contact port for exposing the I-beam wheel.

[0017] Furthermore, the dust cover has an insertion port at the top and a vertical plate that is interference-fitted with the insertion port is installed at the bottom of the dust cover.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. When browsing, this invention allows users to find the character block corresponding to the book title or keywords in the book content by rotating the I-beam wheel. Pressing the Chinese character on the character block initiates the search. When the character block is pressed, the protrusion on it presses against the pressure rod, forcing the pressure plate to move. This causes the contact plate to contact the contact point, activating the microcontroller and displaying the book to be searched on the screen. The user rotates the I-beam wheel while pressing the character block, combining mechanical searching with press confirmation. This provides an interactive experience different from traditional keyboards or touchscreens, allowing the search to be completed while finding the corresponding character block, increasing the enjoyment of browsing books and enhancing the device's practicality. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is an exploded view of the dust cover structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the drive motor and drive shaft structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure on the support plate of the present invention;

[0024] Figure 5 This is a three-dimensional sectional view of part of the structure of the present invention;

[0025] Figure 6 This is an exploded view of the structure on the base of the present invention;

[0026] Figure 7 This is a schematic diagram of the extrusion plate and the structure of the letter block of the present invention;

[0027] Figure 8 This is a three-dimensional cross-sectional view of the I-beam wheel structure of the present invention. Figure 1 ;

[0028] Figure 9 This is an exploded view of part of the structure of this invention;

[0029] Figure 10 This is a schematic diagram of the I-beam wheel structure of the present invention;

[0030] Figure 11 This is a three-dimensional cross-sectional view of the I-beam wheel structure of the present invention. Figure 2 .

[0031] Reference numerals: 1. Display screen; 2. Base; 3. I-beam wheel; 301. Return spring; 302. Pressing plate; 303. Abutting plate; 304. Pressure rod; 305. Character block; 306. Elastic element; 307. Protrusion; 4. Drive motor; 5. Push spring; 6. Positioning block; 7. Positioning hole; 8. Bearing plate; 9. Receiving sleeve; 10. Insertion block; 11. Abutting spring; 12. Receiving groove; 1201. 13. Slot; 14. Drive shaft; 15. Deep groove; 16. Protrusion; 17. Groove; 18. Vertical rod; 19. Inner cavity; 20. Compression spring; 21. Chamfered plate; 22. Vertical hole; 23. Fixing groove; 24. Buckle; 25. Fastening strap; 26. Bolt; 27. Guide groove; 28. Annular plate; 29. ​​Dust cover; 20. Contact port; 20. Insertion port; 21. Vertical plate; 22. Support rod. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] like Figure 1 - Figure 11 As shown, in some embodiments of the present invention, a book reading device includes a display screen 1, and further includes:

[0034] A base 2 has an I-beam wheel 3 rotatably mounted on it. A return spring 301 is mounted on the I-beam wheel 3. A pressing plate 302 is mounted on the free end of the return spring 301. Figure 1 From the main perspective, the axis of the return spring 301 is located in the vertical direction, and the compression plate 302 is in sliding contact with the I-beam wheel 3;

[0035] A contact plate 303 is installed on the extrusion plate 302, and a contact point is installed on the base 2 for being abutted by the contact plate 303. The contact point is electrically connected to a microcontroller. The microcontroller is connected to the display screen 1 through a wire. The microcontroller is located at the bottom of the extrusion plate 302. The contact plate 303 is made of iron or other conductive materials. The display screen 1 is connected to the computer host. When the extrusion plate 302 is pressed down, the contact plate 303 gradually approaches the contact point, causing the contact point to drive the microcontroller to send an electrical signal. The signal is fed back to the computer host through the wire and the transcoder and displayed on the display screen 1 for easy viewing by the user.

[0036] A pressure rod 304 is mounted on the extrusion plate 302, and a character block 305 is slidably mounted on the I-beam wheel 3. The character block 305 has Chinese characters on it, which can be set by engraving or etching. Each microcontroller has a position code corresponding to the character block 305. Each character block 305 or each group of character blocks corresponds to a unique identifier (such as a position code). After detecting a trigger signal, the microcontroller obtains the current rotation position of the I-beam wheel 3 (which can be determined by an encoder or positioning hole sequence) and the identifier of the triggered character block, and sends this encoded information to the host computer. The host computer displays the corresponding book information on the display screen 1 according to a preset mapping table. An elastic joint is installed between the character block 305 and the I-beam wheel 3. The component 306 has a protrusion 307 installed on the character block 305 for abutting against the pressure rod 304. The character block 305 is slidably connected to the I-beam wheel 3 in the horizontal direction. The side of the protrusion 307 has an arc-shaped surface. The elastic element 306 can be a spring or a thin plate made of spring steel. When the character block 305 is pressed, it moves the protrusion 307 closer to the pressure rod 304. Then, gradually guided by the arc-shaped surface on the protrusion 307, the protrusion 307 is forced to press the pressure rod 304 downward, forcing the contact plate 303 to abut against the contact point. During the process, the elastic element 306 undergoes elastic deformation. After the pressing is completed, the elastic element 306 resets through elastic deformation, driving the character block 305 to reset, which is convenient for the next search.

[0037] Since this application is used to search for Chinese language books, the book titles mostly use common characters and rarely use rare characters. Also, since these are Chinese language books, transliterated words such as Hamlet are usually not used for searching. Therefore, the characters set on block 305 are sufficient for searching. Moreover, when searching, taking "Dream of the Red Chamber" as an example, one can search for the three characters "red", "building", and "dream" in the book title, as well as the names of the main characters in the book such as "Lin", "Dai", and "Yu", and also search for well-known nicknames such as "Lin", "sister" and "sister". Therefore, the Chinese characters set on block 305 do not need to be too many or too complex.

[0038] Compared with existing technologies, when searching, the user rotates the I-beam 3 to find the character block 305 corresponding to the book title or the keyword in the book content. Pressing the Chinese character on the character block 305 performs the search. When the character block 305 is pressed, the protrusion 307 on it presses against the pressure rod 304, which in turn forces the pressure plate 302 to be pressed, causing the contact plate 303 to contact the contact point, activating the microcontroller, and thus displaying the book to be searched on the display screen 1. During the search, the user rotates the I-beam 3 while pressing the character block 305. This operation method combines mechanical searching and pressing confirmation, providing an interactive experience different from traditional keyboards or touch screens. It can complete the search while finding the corresponding character block 305, increasing the enjoyment of reading books and enhancing the practicality of the device.

[0039] like Figure 3 Figure 6 and Figure 10 As shown, a portion of the structure on the base 2 is disclosed. In some embodiments, a drive motor 4 is installed on the base 2. The output shaft of the drive motor 4 is connected to the rotating shaft of the I-beam wheel 3. In use, by starting the drive motor 4, it can drive the I-beam wheel 3 to rotate slowly, so that the reader can rotate the I-beam wheel 3 with less effort, increasing the convenience of the reading process.

[0040] A push spring 5 is installed on the base 2, and a positioning block 6 is installed on the free end of the push spring 5. The bottom of the I-beam wheel 3 is provided with a positioning hole 7 for accommodating the positioning block 6. Multiple I-beam blocks 305 are arranged in a vertical array to form a block column. The block column is arranged in a ring on the I-beam wheel 3 along the axis of the I-beam wheel 3. There are multiple positioning blocks 6, and their number is consistent with the number of block columns. An inclined surface is provided on the side wall of the positioning block 6.

[0041] When the device is used for searching, the drive motor 4 drives the I-beam wheel 3 to rotate, searching for the character block 305. The drive motor 4 starts intermittently. The microcontroller controls the drive motor 4 to rotate intermittently according to a preset program or user input (such as a button), and uses the cooperation of the positioning block 6 and the positioning hole 7 to achieve precise positioning, so that different character block columns can be placed in front of the user in sequence. Suppose there are three sets of blocks on the I-beam wheel 3, namely block column one, block column two, and block column three. When in use, block column one is facing the user. The drive motor 4 starts, driving the I-beam wheel 3 to rotate. During the process, the positioning hole... The inner wall of 7 abuts against the positioning block 6, forcing the push spring 5 to be compressed, and the positioning block 6 separates from the positioning hole 7. When the rotation continues until the second block is in front of the reader, the positioning hole 7 rotates again to align with the next positioning block 6. At this time, the push spring 5 pushes the positioning block 6 into the positioning hole 7, and the drive motor 4 also stops working. With the positioning block 6 inserted into the positioning hole 7, the side wall of the positioning block 6 blocks and restricts the inner wall of the positioning hole 7, thus restricting the rotation of the I-beam wheel 3, so that the reader can keep it stable and not rotate when viewing the block 305, increasing the convenience of reading.

[0042] like Figure 4 and Figure 5 As shown, a portion of the structure on the I-beam wheel 3 is disclosed. In some embodiments, a support plate 8 is slidably mounted on the I-beam wheel 3. The support plate 8 is used to support the character block 305. A protrusion 307 is mounted on the support plate 8. The support plate 8 is connected to an elastic member 306. A plate body is mounted on the I-beam wheel 3. The elastic member 306 is located between the support plate 8 and the plate body to install the support plate 8.

[0043] A receiving sleeve 9 is installed on the bearing plate 8. An insertion block 10 that penetrates the side wall of the receiving sleeve 9 is slidably installed on the receiving sleeve 9. There are two insertion blocks 10. An anti-collision spring 11 is installed between the insertion blocks 10. The anti-collision spring 11 forces the two insertion blocks 10 to move closer to each other.

[0044] The character block 305 has a receiving groove 12 for accommodating the receiving sleeve 9. The receiving groove 12 has a slot 1201 for accommodating the insertion block 10. When the character block 305 is located on the support plate 8, the receiving sleeve 9 is located in the receiving groove 12, and the insertion block 10 is pushed by the abutment spring 11 and inserted into the slot 1201. The I-beam 3 is equipped with a support rod 29 that passes through the support plate 8 and is inserted into the receiving sleeve 9. The support rod 29 forces the two insertion blocks 10 to move away from each other. The support rod 29 is located between the insertion blocks 10. The support rod 29 is installed on the plate of the I-beam 3. The end of the support rod 29 is an arc-shaped surface. Therefore, when the support rod 29 is inserted between the insertion blocks 10, its own volume is larger than the space between the insertion blocks 10, thus forcing the insertion blocks 10 to move away from each other.

[0045] There are two slots 1201, and the furthest distance between the two slots 1201 is greater than the diameter of the receiving groove 12. The spacing is such that when the insertion block 10 is inserted, the insertion block 10 can engage with the side wall of the slot 1201 to prevent the character block 305 from falling off the support plate 8.

[0046] When the device needs to replace the character block 305 after prolonged use, the support plate 8 is pulled away from the I-beam wheel 3, thereby moving the insertion block 10 on the support plate 8 away from the support rod 29 on the I-beam wheel 3. When the support rod 29 separates from the insertion block 10, the abutment spring 11 pulls the insertion blocks 10 closer together, causing the insertion block 10 to separate from the receiving groove 12. At this time, the receiving sleeve 9 can separate from the receiving groove 12, and the character block 305 can be disassembled and replaced. When the characters on the character block 305 are worn after prolonged use, it can be replaced, increasing the practicality of the device.

[0047] like Figure 3 and Figure 8 As shown, a portion of the structure on the base 2 is disclosed. In some embodiments, a drive shaft 13 is rotatably mounted on the base 2. The drive shaft 13 is coaxially connected to the output shaft of the drive motor 4. When the drive motor 4 starts, it drives the drive shaft 13 to rotate.

[0048] The I-beam wheel 3 has a deep groove 14 for accommodating the drive shaft 13. A protrusion 15 is installed in the deep groove 14. The drive shaft 13 has a groove 16 for accommodating the protrusion 15. The I-beam wheel 3 is inserted into the drive shaft 13 through the deep groove 14. When the drive shaft 13 rotates, since the protrusion 15 is inserted into the groove 16, the inner wall of the groove 16 abuts against the side wall of the protrusion 15, so that the drive shaft 13 can drive the I-beam wheel 3 to rotate together, so that the I-beam wheel 3 will not slip.

[0049] When installing the I-beam wheel 3, align the deep groove 14 on it with the drive shaft 13, align the protrusion 15 with the groove 16, and then insert the I-beam wheel 3 onto the drive shaft 13. Modularizing the components of the device not only facilitates transportation, but also makes it easier to repair and replace when damaged, thus increasing the practicality of the device.

[0050] like Figure 10 and Figure 11 As shown, a portion of the structure on the I-beam 3 is disclosed. In some embodiments, a vertical rod 17 is installed on the top of the I-beam 3, and a vertical hole 18 for accommodating the vertical rod 17 is installed on the bottom of the I-beam 3. When the device is used in a large library, the type block 305 on one I-beam 3 may not be enough. Therefore, two or more I-beams 3 can be stacked. When stacking, the vertical hole 18 on the I-beam 3 to be installed is aligned with the vertical rod 17 on the installed I-beam 3, and then the I-beam 3 to be installed is inserted and stacked on the installed I-beam 3.

[0051] The vertical rod 17 has an inner cavity 1701, part of which is located inside the vertical rod 17 and part is located inside the I-beam wheel 3, such as... Figure 11 As shown, a compression spring 1702 is installed inside the inner cavity 1701. A U-shaped plate 1703 is installed on the free end of the compression spring 1702. A fixing groove 19 for accommodating one end of the U-shaped plate 1703 is opened in the vertical hole 18. The other end of the U-shaped plate 1703 passes through the side wall of the I-beam wheel 3 and extends to its outside. The U-shaped plate 1703 has a long section and a short section. The long section passes through the side wall of the I-beam wheel 3 and is located on the outside. The short section is inserted into the side wall of the vertical rod 17. Located on the outside, when installing the additional I-beam wheel 3, first press the chamfered plate 1703 to retract it into the inner cavity 1701. After inserting the vertical rod 17 into the vertical hole 18, release the chamfered plate 1703 so that its short section can be inserted into the fixing groove 19. By blocking the inner wall of the fixing groove 19 through the side wall of the chamfered plate 1703, the tendency of the two I-beam wheels 3 to move away from each other is limited, which increases the stability of the installation between the I-beam wheels 3.

[0052] like Figure 10As shown, a portion of the structure of the I-beam wheel 3 is disclosed. In some embodiments, a buckle 20 is installed on the I-beam wheel 3. The buckle 20 is a square block with a through hole. A tightening strap 21 is slidably disposed on the buckle 20. The tightening strap 21 passes through the hole on the buckle 20 and is wrapped around the buckle 20. The tightening strap 21 has a metal strip inside and is wrapped with sponge on the outside, which reduces the possibility of cutting people nearby.

[0053] The tightening band 21 is used to abut against the outer end of the C-shaped plate 1703. A bolt 22 is rotatably mounted on one end of the tightening band 21, and the bolt 22 is threadedly connected to the other end of the tightening band 21. When it is necessary to install or remove the I-beam wheel 3, the bolt 22 is rotated, and the movement of the bolt 22 drives the two tightening bands 21 to move closer to each other, forcing the body of the tightening band 21 to squeeze the C-shaped plate 1703, pressing the C-shaped plate 1703 into the inner cavity 1701, so that multiple C-shaped plates 1703 can be simultaneously disconnected from the fixing groove 19, which facilitates the operator to install and remove the I-beam wheel 3 and increases the practicality of the device.

[0054] like Figure 6 As shown, a portion of the structure on the base 2 is disclosed. In some embodiments, a guide groove 23 is provided on the base 2, and the positioning block 6 is slidably inserted into the guide groove 23. The side wall of the positioning block 6 is in contact with the inner wall of the guide groove 23, and the depth of the guide groove 23 is greater than the thickness of the positioning block 6. When the push spring 5 is at its original length, the upper half of the positioning block 6 can be inserted into the positioning hole 7, while its lower half remains in the guide groove 23. This ensures that when the positioning block 6 slides, its side wall is always blocked and restricted by the inner wall of the guide groove 23, thus limiting the sliding path of the positioning block 6. This ensures that when the push spring 5 returns to its original length, the positioning block 6 can be accurately inserted into the positioning hole 7, increasing the feasibility of the device.

[0055] like Figure 6 As shown, a portion of the structure on the base 2 is disclosed. In some embodiments, an annular plate 24 is installed on the base 2. The inner diameter of the annular plate 24 is consistent with the outer diameter of the I-beam wheel 3. The annular plate 24 and the base 2 form a recess for accommodating the I-beam wheel 3. When the I-beam wheel 3 is mounted on the base 2, the annular plate 24 blocks the lower part of the I-beam wheel 3, increasing the contact area between the I-beam wheel 3 and the base 2, and further increasing the stability of the I-beam wheel 3 on the base 2.

[0056] like Figure 1 and Figure 2As shown, a portion of the structure on the base 2 is disclosed. In some embodiments, a dust cover 25 is installed on the base 2. The inner diameter of the dust cover 25 is larger than the outer diameter of the I-beam wheel 3. The dust cover 25 has a contact port 26 for exposing the I-beam wheel 3. The shape of the dust cover 25 is shown in the figure. It covers most of the I-beam wheel 3, reducing the possibility of substances in the external environment causing wear and tear on the Chinese characters on the character block 305. The reader can observe the Chinese characters on the character block 305 through the contact port 26, increasing the practicality of the device.

[0057] like Figure 2 As shown, a portion of the structure of the dust cover 25 is disclosed. In some embodiments, the top of the dust cover 25 has an insertion port 27, and the bottom of the dust cover 25 is fitted with a vertical plate 28 that is interference-fitted with the insertion port 27. Since the I-beam wheel 3 can be added, the dust cover 25 can also be added. When there is only one I-beam wheel 3, only one dust cover 25 is needed to protect it. When it is necessary to add a dust cover 25, the vertical plate 28 on the dust cover 25 to be added is aligned with the insertion port 27 on the dust cover 25 that has already been added. The interference fit between the two makes the connection between the dust covers 25 more stable. The number of dust covers 25 can be installed according to the number of I-beam wheels 3 installed. Compared with the integrated dust cover 25, it can be added as needed, reducing the space occupation rate of the device and increasing the practicality of the device.

[0058] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A book reading device, comprising a display screen (1), characterized in that, Also includes: A base (2) is rotatably mounted on which a zigzag wheel (3) is mounted. A return spring (301) is mounted on the zigzag wheel (3). A pressing plate (302) is mounted on the free end of the return spring (301). A contact plate (303) is mounted on the pressing plate (302). A contact point is mounted on the base (2) for being abutted by the contact plate (303). The contact point is electrically connected to a microcontroller. The microcontroller is connected to a display screen (1). A pressure rod (304) is mounted on the pressing plate (302). A character block (305) is slidably mounted on the zigzag wheel (3). Chinese characters are provided on the character block (305). An elastic element (306) is installed between the character block (305) and the zigzag wheel (3). A protrusion (307) for abutting the pressure rod (304) is mounted on the character block (305).

2. The book reading device according to claim 1, characterized in that, A drive motor (4) is installed on the base (2). The output shaft of the drive motor (4) is connected to the rotating shaft of the I-beam wheel (3). A push spring (5) is installed on the base (2). A positioning block (6) is installed on the free end of the push spring (5). A positioning hole (7) for accommodating the positioning block (6) is opened at the bottom of the I-beam wheel (3).

3. The book reading device according to claim 2, characterized in that, A bearing plate (8) is slidably mounted on the I-beam wheel (3). The bearing plate (8) is connected to an elastic element (306). A receiving sleeve (9) is mounted on the bearing plate (8). An insertion block (10) penetrating the side wall of the receiving sleeve (9) is slidably mounted on the receiving sleeve (9). There are two insertion blocks (10). A resisting spring (11) is installed between the insertion blocks (10). A receiving groove (12) for receiving the receiving sleeve (9) is opened on the block (305). A slot (1201) for receiving the insertion block (10) is opened in the receiving groove (12). A support rod (29) penetrating the bearing plate (8) and inserted into the receiving sleeve (9) is mounted on the I-beam wheel (3). The support rod (29) forces the two insertion blocks (10) to move away from each other.

4. The book reading device according to claim 3, characterized in that, A drive shaft (13) is rotatably mounted on the base (2). The drive shaft (13) is coaxially connected to the output shaft of the drive motor (4). A deep groove (14) for accommodating the drive shaft (13) is provided on the I-beam wheel (3). A protrusion (15) is installed in the deep groove (14). A groove (16) for accommodating the protrusion (15) is provided on the drive shaft (13).

5. The book reading device according to claim 4, characterized in that, The top of the I-beam wheel (3) is equipped with a vertical rod (17), and the bottom of the I-beam wheel (3) is equipped with a vertical hole (18) for accommodating the vertical rod (17). An inner cavity (1701) is opened on the vertical rod (17), and a compression spring (1702) is installed in the inner cavity (1701). A U-shaped plate (1703) is installed on the free end of the compression spring (1702). A fixing groove (19) for accommodating one end of the U-shaped plate (1703) is opened in the vertical hole (18), and the other end of the U-shaped plate (1703) passes through the side wall of the I-beam wheel (3) and extends to its outside.

6. The book reading device according to claim 5, characterized in that, The I-beam wheel (3) is equipped with a buckle (20), and a tensioning band (21) is slidably disposed on the buckle (20). The tensioning band (21) is used to abut against the outer end of the I-beam plate (1703). A bolt (22) is rotatably installed on one end of the tensioning band (21), and the bolt (22) is threadedly connected to the other end of the tensioning band (21).

7. The book reading device according to claim 6, characterized in that, The base (2) has a guide groove (23) and the positioning block (6) is slidably inserted into the guide groove (23). The side wall of the positioning block (6) is in contact with the inner wall of the guide groove (23).

8. The book reading device according to claim 7, characterized in that, An annular plate (24) is installed on the base (2). The inner diameter of the annular plate (24) is the same as the outer diameter of the I-beam wheel (3). The annular plate (24) and the base (2) form a recess for accommodating the I-beam wheel (3).

9. The book reading device according to claim 8, characterized in that, A dust cover (25) is installed on the base (2). The inner diameter of the dust cover (25) is larger than the outer diameter of the I-beam wheel (3). The dust cover (25) has a contact port (26) for exposing the I-beam wheel (3).

10. The book reading device according to claim 9, characterized in that, The dust cover (25) has an insertion port (27) at the top and a vertical plate (28) that is interference-fitted with the insertion port (27) is installed at the bottom of the dust cover (25).

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